I think it was whenever they stopped giving the Moto G series numbers (G5, G7, etc), and just started making them "Moto G (Year)". Official LineageOS support ha

I think it was whenever they stopped giving the Moto G series numbers (G5, G7, etc), and just started making them "Moto G (Year)". Official LineageOS support has gotten worse since then, but I don't know if it's because they can't find maintainers or what.